/Engine/Plugins/Online/OnlineSubsystem/Source/Public/Interfaces/OnlinePurchaseInterface.h
Add a offer entry for purchase
void AddPurchaseOffer ( const [FOfferNamespace](API\Plugins\OnlineSubsystem\Interfaces\FOfferNamespace) & InNamespace, const [FUniqueOfferId](API\Plugins\OnlineSubsystem\Interfaces\FUniqueOfferId) & InOfferId, int32 InQuantity, bool bInIsConsumable )